Adult Psychiatry 2 Flashcards
How many adults in the UK have ‘broadly defined neurosis’ at any one time?
15%
Most common anxiety disorders in the UK
Mixed anxiety-depression
GAD
How many GP consultations are for anxiety related sx?
25%
Mean age of onset of GAD
30
Mean age of onset of panic disorders
22-25
Mean age of onset of OCD
20
Mean age of onset of social phobia
15
Mean age of onset of phobia of blood injury injection or environmental types
5-9 years
Mean age of onset of situational phobias
20 years
What has been noted about the dx of anxiety disorders and age?
With each generation, anxiety disorders are diagnosed at a younger age than previous
Lifetime prevalence of blood-injection-injury phobia
3.5%
What do subjects with blood-injury-injection phobia have a higher lifetime hx of?
Fainting
Seizures
In which groups is prevalence of blood-injury-injection lower?
Elderly
In which groups is prevalence of blood-injury-injection higher?
Females
Less education
Which anxiety disorder is most common in boys?
OCD
Which anxiety disorder has equal distribution between men and women?
OCD
In which anxiety disorder do men outnumber women in attending health centres?
Social phobia
What do NICE recommend is needed first before treating anxiety disorders?
Comprehensive assessment considering distress, functional impairment, effect of co-morbid MI, substance misuse or medical conditions and previous response to treatment
First line treatment for anxiety disorders
Psychological therapy first
Which pharmacological therapy is advised for anxiety disorders?
SSRIs
When to consider combination therapy for anxiety disorders?
Complex anxiety disorders refractory to treatment
Point prevalence of OCD in adults
1-3%
Point prevalence of OCD in children
1-2%
Lifetime prevalence of OCD
2-3%
Most commonly prevalent psychiatric disorders?
Phobias
Alcohol misuse
Depression
OCD
(in that order)
Gender ratio of OCD in community
1.5:1 female:male
Why is it thought that there is a greater ratio of women with OCD in the community despite equal gender ratio of the disease?
Men have more severe psychopathology
Difference in OCD between males and females
Men show earlier onset and trend more towards tics and poorer outcome
Who created the four factor model of OCD?
Castle & Phillips 2006
What is the four factor model of OCD?
Aggressive, sexual and religious obsessions and checking compulsions
Symmetry and ordering obsessions and compulsions
Contaminatino obsessions and cleaning compulsions
Hoarding obsessions and compulsions
Which obsessions & compulsions are often chronic and treatment resistant?
Symmetry ordering often chronic and Rx resistant
Hoarding often Rx resistant
Which obsession/compulsion may be neurobiologically ditinct?
Hoarding
What neurobiology has been reported in OCD?
Hypermetabolism of basal ganglia structures i.e. caudate
Which medications can cause OCD sx?
D2 antagonists such as clozapine and other antipsychotics
Which children have higher rates of OCD?
Children with autoimmune reactions
What can OCD spectrum disorders be classified into?
Somatic preoccupation e.g. anorexia
Neurological disorders e.g. Tourettes
Impulse control disorders e.g. paraphilias
Anankastic PD
What does PANDAS stand for?
Paediatric autoimmune neuropsychiatric disorders associated with strep infection
What is PANDAS?
Thought to be secondary to streptococcal infection and mediated by autoantibodies binding to basal ganglia.
What sx does PANDAS produce?
Tics
Fluctuating OCD sx
Anxiety
NIMH diagnostic criteria for PANDAS
Presence of OCD or a tic disorder
Onset between 3 years of age and beginning of puberty
Abrupt onset of sx or a course characterised by dramatic exacerbations of sx
Onset of exacerbation of sx temporally related to infection with GABHS
Abnormal neuro exam during exacerbation
What is GABHS?
Group A beta-haemolytic strep infection
What is found to be elevated in those with PANDAS?
AntiDNAseB or Antistreptolysin O titres
Some may have autoantibodies to neurons in basal ganglia; called basal ganglia antibodies
Treatment for mild-moderate OCD (first line)
Self-help
2nd line treatment for mild-moderate OCD
CBT with ERP (Exposure and response prevention)
3rd line treatment for mild-moderate OCD
SSRIs +/- CBT
1st line treatment for severe OCD
SSRIs+/-CBT
How long do people with severe OCD need to continue SSRIs if they respond well?
1-2 years +/- booster CBT
2nd line treatment for severe OCD
Switch to different SSRI or clomipramine
What is exposure and response prevention?
Element of CBT for OCD
What happens in exposure and response prevention?
Patients are trained to confront (directly or imaginative) anxiety-provoking situations while abstaining from compulsive behaviours in response.
Evidence for ‘booster’ sessions of ERP for OCD?
Can reduce risk of relapse and provide more durable remission than pharmacotherapy alone
What type of medications does OCD respond well to?
Serotonergic medications i.e. SSRIs, clomipramine.
How many patients with OCD show some sort of improvement to SSRI?
60-70%
NNT for SSRI for OCD?
6-12
When is antipsychotic augmentation with SSRI considered for OCD?
If no response after 3 month trial of maximal dose of SSRI.
Particularly useful if tics.
What has happened to PTSD diagnosis in DSM V?
Criteria changed
Moved from anxiety disorders into ‘trauma and stressor-related disorders’
Clinical subtype ‘dissociative sx’ added
Diagnostic criteria for PTSD for DSM V
Hx of exposure to traumatic event that meets specific stipulations and sx from each of 4 clusters:
Avoidance
Negative alterations in cognitions and mood
Alterations in arousal
Reactivity
Point prevalence of PTSD
1%
Incidence of PTSD worldwide?
Varies
Lifetime prevalence of PTSD in America for adults?
6.8%
Lifetime prevalence of PTSD in men vs women
Men: 3.6%
Women: 9.7%
Which gender is more likely to be exposed to traumatic events?
Men: 60%
Women: 50%
How many people exposed to trauma will develop PTSD?
30%
Most frequently experienced trauma?
Witnessing someone being badly injured/killed
Exposure to fire/flood/natural disaster
Involved in life-threatening accident
Combat exposure
(in that order)
Which gender is molestation more common in?
Females
Which gender is mugging more common in?
Males
In which type of trauma do men develop more PTSD?
Rape
Which age group is more likely to develop PTSD?
Younger
In which type of patients is PTSD more common?
Younger
Those with higher anxiety response to initial event
Those who perceive external locus of control
What does NICE recommend re PTSD initially?
Primary care diagnosis and screening as likely underdiagnosed
Who did research into factors associated with PTSD?
Bisson 2007
Pre-traumatic factors of PTSD?
Previous psychiatric disorder
Female
Personality - external locus of control
Lower socioeconomic & educational status
Etnic minotiry
Cluster B PD
Peritraumatic factors for PTSD?
Higher severity of trauma
Perceived threat to life
Peritraumatic dissociation
Post-traumatic factors for PTSD?
Perceived lack of social support
Subsequent life stress or physical illness - especially chronic pain
Protective factors for PTSD?
High IQ
Higher social class
Opportunity to grieve for loss
Which areas of the brain show abnormalities in PTSD?
Hippocampus
Amygdala
What type of metabolic disturbance is shown in PTSD?
Hypocortisolaemia
What features predict chronicity in PTSD?
Strong avoidance features
Which interventions have been shown to be beneficial for PTSD?
Multiple-session CBT to prevent PTSD in people with acute stress disorder
Which interventions are unlikely to be beneficial in PTSD?
Single-session individual debriefing to prevent PTSD
Supportive counselling to prevent PTSD
NICE guidelines for initial management of PTSD in primary care
Watchful waiting if sx are mild and present for <4 weeks after trauma
When does NICE recommend px of non-benzo sleeping tablet for PTSD in primary care?
After 4 consecutive nights sleep disturbance
NICE Guidelines for PTSD in secondary care
Psychological treatment regularly and continuously (once a week) by the same person